assertFailsWith<IllegalArgumentException> {
      Request.Builder().method("GET", "abc".toRequestBody("text/plain".toMediaType()))
    }
  }

  @Test
  fun head() {
    server.enqueue(
      MockResponse(
        headers = headersOf("Content-Type", "text/plain"),
      ),
    )
    val request =
      Request
        .Builder()
        .url(server.url("/"))
        .head()

        .addHeader("Content-Type: text/plain")
        .addHeader("Last-Modified: " + formatDate(-2, TimeUnit.HOURS))
        .addHeader("Expires: " + formatDate(-1, TimeUnit.HOURS))
        .build(),
    )
    server.enqueue(
      MockResponse
        .Builder()
        .code(HttpURLConnection.HTTP_NOT_MODIFIED)
        .addHeader("Content-Type: text/plain")
        .addHeader("Content-Encoding: gzip")

  fun getContentTypeConnects() {
    server.enqueue(
      MockResponse(
        headers = headersOf("Content-Type", "text/plain"),
        body = "ABC",
      ),
    )
    val response = getResponse(newRequest("/"))
    assertThat(response.body.contentType()).isEqualTo(
      "text/plain".toMediaType(),
    )
    response.body.close()
  }

  @Test
  fun getContentEncodingConnects() {